Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X900-50S
The AirTAC Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X900-50S is a genuine double acting, adjustable stroke JIS-standard air cylinder with a Ø125mm bore and 900mm stroke, G1/2 air ports and adjustable end cushioning. Its no-tie-rod, hard-anodized profile barrel is more compact than an ISO 15552 cylinder of the same bore — a space-saver on tight machines.
- BoreØ125 mm
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting, adjustable stroke
- Rod threadM27×2.0
- CushionAdjustable, 33 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X900-50S
Delivering 6136 N of extend force at 0.5 MPa, this 125 mm bore JIS profile cylinder packs serious thrust into a body noticeably shorter than a same-bore ISO 15552 unit. The hard-anodized aluminum extrusion omits tie rods entirely, and the G1/2 port feeds a 32 mm rod threaded M27x2.0.
The -50 code means an external adjuster can shorten the extend stroke on-site by up to 50 mm, giving a usable 850-900 mm range while the retract end stays fixed. This lets you fine-tune the end position without swapping the cylinder. It handles about 3682 N of real work safely, lifting roughly 313 kg vertically with a 2:1 margin. The -S suffix adds a piston magnet for CMSE/DMSE sensors.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X900-50S Technical Specifications
| Model | Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X900-50S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 33 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC JSI (JIS standard) datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G. Barrel: hard-anodized aluminum profile (no tie rods).
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X900-50S
| JSIJ | JIS-standard profile cylinder (adjustable-stroke type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×900 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensors. |
JSI-family variants: JSI (double acting), JSID (double rod), JSIJ (adjustable stroke). Mounting: LB / FA / FB / CA / CB / CR / TC / TCM1 / TCM2. Thread PT (blank) / G.
Where the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X900-50S Is Used
Heavy Pallet Lift
Raises loaded pallets in a distribution hub, using the 50 mm extend adjustment to fine-tune the exact discharge height.
Press Ejection
Pushes heavy stamped parts out of a hydraulic press, dialing in the ejection distance on-site to clear the tooling.
Automated Storage
Actuates a large load tray in an automated storage system, shortening the extend stroke by 50 mm to match shelf depth.
Is the Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X900-50S the Right Cylinder?
When sizing, the 100 mm bore offers 3927 N push at 0.5 MPa, while this 125 mm bore reaches 6136 N; if you need the maximum 1251 kgf at 1.0 MPa, you are at the top edge with no larger standard bore. The 50 mm adjustable window is ideal for sharing one spare across slightly different stroke variants or finalizing end positions on-site. Mounting options include FA, LB, TC, TCM1, and TCM2. Because the 900 mm stroke is long, always use an external guide to prevent rod bending and side loads. The -S magnet supports CMSE/DMSE switches.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Set cushions to minimum, then release gradually.
- check Use correct mounting accessory (LB/FA/FB/CA/CB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac JSIJ100~125 Adjustable Cylinder JSIJ125X900-50S FAQ
It pushes 6136 N and pulls 5734 N at 0.5 MPa, pushes 8590 N and pulls 8028 N at 0.7 MPa, with a theoretical max of 1251 kgf at 1.0 MPa. The air port is G1/2, the rod is 32 mm with an M27x2.0 thread, and speed is 30-500 mm/s.
The nominal 900 mm stroke is the maximum. An external stop screw lets you shorten the extend stroke by up to 50 mm on-site, yielding a usable 850-900 mm range. The retract end is fixed, and this stop only sets position—it does not lock the load.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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